Rheem 551180 Owner's Manual And Installation Instructions page 21

Heat pump water heaters
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MAJOR SERVICE EVERY FIVE YEARS
It is recommended a major service be conducted on the water heater every five (5) years.
Warning: Servicing of a water heater must only be carried out by qualified personnel. Phone Rheem
Service or their nearest Accredited Service Agent / Centre.
Note: The major service and routine replacement of any components, such as the anode and relief valve(s),
are not included in the Rheem warranty. A charge will be made for this work. Only genuine replacement
parts should be used on this water heater.
The major service includes:
Replace the temperature pressure relief valve.
Inspect and flush the expansion control valve (if fitted). If required, replace the valve.
Inspect and if required, replace the anode.
If the anode is not replaced, it should be replaced within three years of this service.
"Anode Inspection and Replacement"
Refer to
Check the electric heating unit for excessive calcium build-up or corrosion and replace if necessary.
Flush the water heater tank (if required).
Check and clean the heat pump of dust and residue.
Check and inspect the heat pump for operation.
Visually check the unit for any potential problems.
Inspect all connections.
Inspect around the air inlet and outlet louvres and the water heater in general for plant growth.
Inspect around the water heater for infestations of insects, such as ants.
Inspect and check the condensate drain hose.
Check the items covered in the minor maintenance
Note: The water heater may need to be drained during this service. After the completion of the service, the
water heater will take some time to reheat the water. Depending upon the power supply connection, hot
water may not be available until the next day.
HEAT PUMP SYSTEM
It is recommended the evaporator and refrigeration system is checked every five years. In particularly dusty
environments, it may be necessary to have the heat pump system checked and cleaned of dust and residue
on a more regular basis.
on page 23.
21
MAINTENANCE REQUIREMENTS

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